High quality material This portable folding backpack frame is made of aluminum alloy and nylon, providing reliable strength and long-term durability. It is designed to perform well in harsh outdoor conditions and to withstand extended use. Ergonomic design The frame is shaped to support heavy loads while preserving breathable space for your back. The chest adjustment strap enhances comfort and helps improve airflow during activity. Comfortable padding Inside the backpack, thick foam padding offers resilience and comfort, helping to reduce fatigue when carrying essentials for hiking, camping, or other outdoor activities. Practical functions The sturdy backpack frame features a double ring design, allowing you to conveniently hang small accessories such as communication devices or water bottles for easy access. Use scenarios - Hiking and camping trips: carry your essential gear with a comfortable, ergonomic frame that helps minimize back fatigue during long treks. - Outdoor work or rugged terrain tasks: rely on a durable aluminum frame that stands up to demanding conditions while keeping equipment organized and accessible. - Travel and expeditions: use the hanging rings to keep important items within reach, improving efficiency on the move.